I think you are doing wonderfully!!!! It IS difficult, it IS a very addictive substance! Don't let the negative thoughts in, you are doing a good thing for yourself.

Use the patches properly as you need to, you'll wean off them eventually, I'm sure.
I've read where adding excercise is another good thing, so instead of driving around the block like you used to, maybe you could walk some place, or up and down some stairs

Sorry if I've forgotten if you can't.
You have NOT failed.

Even if you tried before, you haven't failed...because you are still working on this!
Each time you tried, you got stronger, and yes, this time you can do it!